2: Ancient River Valley Civilization | The Ancient River Valley Civilization started off a huge chain of reactions that led us to where we are today. People finally learned new things like farming which allowed for new ways to provide for themselves. Since farming was more of manual labor women would stay at home with the kids and take care of the house, changing the gender roles for us in the long-road a ton. Because farming only took a few people to get it done more people could create and build new things like better homes, plumbing and articles of clothing. With more things to provide for themselves, they could stay in the same area.

3: What If... people had not learned how to farm? | If people never learned how to farm then today we would still be hunters and gatherers. We wouldn't have all of our advanced technology that we have today like computers and cell phones. We would have to provide for ourselves and would live shorter lives because of it. We would still be forced to live in little small huts and be nomads because we wouldn't of learned how to build big houses out of bricks and stones.

4: Classical Greece/Rome was a time of the Pax Romana and the great down fall of Rome. New technology was created. People slowly were starting to go towards a Limited Democracy rather than an Absolute Monarchy. During the Pax Romana, Rome prospered and everything was good in the world. As the empire declined though, Rome fell apart. With the destruction of Rome came a new city called Constantinopale. | Classical Greece/ Rome

5: If Rome had not fallen then we wouldn't have lost 600 years of knowledge. We would have even more technology than we do now and would know many more things. We probably would have things like flying cars and would know more scientific and mathematic things. We would probably even have a better economy. | What If... Rome did not fall?

6: Genghis Khan was a huge influential figure in Asia in 1100-1200 A.D. and forever after that. He was a brutal and killed many people, but opened the Silk Road which helped everyone across the globe. It allowed for people to have a safe trade route. In Africa the Bantu people started to spread out across Africa. Some of these things were items like gold, salt, and ivory from elephant tusk. Finding these new materials helped Africa move forward in their economy. | Post-Classical Asia/Africa

7: If the Silk Road was never created than many countries wouldn't have been introduced to each other for a long time. | What If... the Mongols had not opened the Silk Road to safe travels? | People wouldn't of been able to trade, which would of made it harder for cultures to get blended together. The Mongols wouldn't of controls so much of China either. He would of had less control and many of people wouldn't of died because he felt the need to kill everyone he didn't like.

8: Due to the Middle Ages we lost nearly 600 years of knowledge. The Middle Ages though also set in motion the Crusades. The Crusades went to go and take back the Holy Land. Instead of coming back though with news of them gaining their land back, they came back with a lot of brand new knowledge that moved us into the Renaissance. | Post-Classical (Medieval) Revolution

9: If the Crusades had not been sent out to go gather more knowledge we would have lost even more knowledge than we already did. We wouldn't have cell phones or computers. We would probably would of had some more wars. We would probably still have slavery. | What If... Pope Urban II had not launched the Crusades?

10: The Renaissance was a time of Rebirth. People began to look back in time to the Greeks and Roman and gained a lot of knowledge. They saw life from a new perspective. People began to believe in a Utopia, or a perfect place where nothing can go wrong. Many new things were created like the printing press by Gutenberg. The Renaissance lead to the Enlightenment and to where we are today. | Renaissance/ Reformation

11: If Gutenberg had never created the printing press in 1440 we would still have to hand write every book that was ever created. We would not have as many books to read just for fun because people wouldn't want rewrite the same book thousands of times over and over. We would only have the necessary books needed to get by in life. The bible also wouldn't have been able to get mass produced so then christianity wouldn't of spread that quickly. | What If... Gutenberg hadn't invented the printing press?

12: The age of Enlightenment lead to many revolutions. We gained a ton of new, scientific knowledge that lead to the Scientific Revolution. Many people like John Locke had new beliefs and started to question the laws and rules they were given. He believed people had natural rights as humans to life, liberty, and property. When he started to question things so were many other people. Montesquieu for example, questioned the government and in turn helped us gain the separation of powers. | Enlightenment/ Revolutions

13: If the Enlightenment ideas were not embraced by the colonist we would not have had the space race nor would we have had our scientific revolution. We would still be very far behind in mathematical discoveries. We wouldn't have things like telescopes and automobiles. We would be centuries behind in discoveries and knowledge. | What If... the Enlightenment ideas were not embraced by the colonists?

14: World War I started with the Assassination of Arch Duke Franz Ferdinand. Germany was very head-strong and wanted to own every country, every where. It started with the Allies and Central powers fighting against one another. | World War I | The Central powers were defeating the Allies until they made a few simple mistakes. The Allies took this as a chance to come back strong and kick the Central powers in the faces. The Allies created the Treaty of Versailles, which solely blamed Germany for the War. The Allies huge comeback may have won them the war, but would lead to another one five times as devastating.

15: If Germany was not solely blamed for the war, I think World War II would not of happened. Germany wouldn't of felt the over-whelming anger towards everyone, especially the Jews. If Germany wasn't solely blamed, millions of people wouldn't of died. | What If... Germany had not been solely blamed for WWI?

16: World War II | World War II was started by Adolf Hitler in 1939, when Hitler took over Poland. The two sides fighting against one another this time a round were the Allie and Axis forces. Hitler wanted complete control along with revenge over and every country he could get his hands on. He wanted to get back at the Jews or people he believed were not apart of the perfect race known as the Aryan race. In another part of the world Japan was beginning to take over parts of China. A day known as D-Day was the beginning when the Allies came in. In 1945 the Allies had defeated the all of the Axis powers, except Japan, who were not going to give up. The United States finally ended the war by dropping two Atomic Bombs on Nagasaki and Hiroshima. The Allies had won once again.

17: What If... the United States had not dropped the Atomic Bombs on Japan? | If the United States never dropped the bombs on Hiroshima and Nagasaki the war would have kept going on for years, but the Cold War could have been prevented. Japan would have probably taken over more of China . They would of gotten help from other Axis powers and would of probably won the war. We wouldn't have atomic bombs all over the world. Every country would probably be communist though.

18: The Cold War | The Cold War was a long-lasting competition between the U.S. (NATO) and the Soviet Union (Warsaw Pact). They both wanted to be the best and the first to accomplish something before the other. Each wanted to prove to the other that they were better and it started a chain reaction of events that defined the Cold War. They both created bomb after bomb showing that they could create bigger and better version of what they just did. They created so many bombs they could of blown up the Earth many, many times. The Cold War caused the creating of the Iron Curtain. With the start of the space race the Soviets were the first to get into space, which only encouraged the United States to do something even better. The United States were the first to land on the moon. The competition lasted for many more years until the won in 1989.

19: What if.... The Soviet Union had landed on the moon first and not the United States? | If the Soviet Union landed on the moon first I believe that the United States would have come to create something even bigger for space. Maybe they would have created a better and faster rocket than the Soviets. The war would have ended much sooner than it had and the Soviets would of probably won the Cold War. There would have been fewer years of competition.